Regardless of being on the "easier" side of the draw, it's been a much improved tournament performance from England. England teams of more recent tournaments would have struggled more in the group before being disptached by Colombia or Sweden. As posted above this team is young with other young players looking to get in, so there is reason to be confident going forward.
That's not to say, however, that there aren't negatives or concerns. First off the backline. Walker is not a centre back, and he sure as sh*t is no Azpilicueta. He's a liability there. Stones is a liability full stop. I like Maguire and I think he'll improve. Also central midfield is a problem. Henderson (and Dier) are only making up the numbers and contributing nothing. And while there is some good attacking talent, Southgate didn't really get the best out of any of them and most of the goals were from set pieces.
But anyway, on the whole England did well and they can return home with their heads held high.